22212222221000 has 64 divisors (see below), whose sum is σ = 59401828586880. Its totient is φ = 7615619044800.

The previous prime is 22212222220973. The next prime is 22212222221047. The reversal of 22212222221000 is 12222221222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1586580302 + ... + 1586594301.

It is an arithmetic number, because the mean of its divisors is an integer number (928153571670).

Almost surely, 2^{22212222221000} is an apocalyptic number.

22212222221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212222221000 is an abundant number, since it is smaller than the sum of its proper divisors (37189606365880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22212222221000 is a wasteful number, since it uses less digits than its factorization.

22212222221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173174631 (or 3173174617 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22212222221000 its reverse (12222221222), we get a palindrome (22224444442222).

The spelling of 22212222221000 in words is "twenty-two trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand".